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No behavior change.
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Each entry's lockpoints are independent of one another, so there isn't
any reason to update lockpoints for entries that will be removed.
Separating the loops also allows us to move validation logic out and
leave lockpoints in txmempool.
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txmempool.h to .cpp file
65aaf9495d19ea3fb875228a7e14aab6c1f2986d refactor: move `update_*` structs from txmempool.h to .cpp file (Sebastian Falbesoner)
9947ce62626c05bd186ae8a4864aa382f673ec1a refactor: use const reference for parents in `CTxMemPool::UpdateAncestorsOf` (Sebastian Falbesoner)
Pull request description:
These helpers are exclusively used in txmempool.cpp, hence they should also be moved there. The PR also contains a commit which fixes const-correctness for parents in `CTxMemPool::UpdateAncestorsOf` and declares them as reference to avoid a copy.
ACKs for top commit:
promag:
Code review ACK 65aaf9495d19ea3fb875228a7e14aab6c1f2986d. Verified move-only commit locally.
Tree-SHA512: 7ce29f3ba0e68b5355001f27725b00f6d54cc993015356eb40b61b8cdd17db49b980f4c3d798c8e0c940d245dc3a72c474bb9ff3c0ee971ead450786076812c2
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performance of check() and remove dependency on validation
082c5bf099c64e3d27abe9b68a71ce500b693e7e [refactor] pass coinsview and height to check() (glozow)
ed6115f1eae0eb4669601106a9aaff078a2f3a74 [mempool] simplify some check() logic (glozow)
9e8d7ad5d9cc4b013826daead9cee09aad539401 [validation/mempool] use Spend/AddCoin instead of UpdateCoins (glozow)
09d18916afb0ecae90700d4befd9d5dc52767970 MOVEONLY: remove single-use helper func CheckInputsAndUpdateCoins (glozow)
e8639ec26aaf4de3fae280963434bf1cf2017b6f [mempool] remove now-unnecessary code (glozow)
54c6f3c1da01090aee9691a2c2bee0984a054ce8 [mempool] speed up check() by using coins cache and iterating in topo order (glozow)
30e240f65e69c6dffcd033afc63895345bd51f53 [bench] Benchmark CTxMemPool::check() (glozow)
cb1407196fba648aa75504e3ab3d46aa0181563a [refactor/bench] make mempool_stress bench reusable and parameterizable (glozow)
Pull request description:
Remove the txmempool <-> validation circular dependency by removing txmempool's dependency on validation. There are two functions in txmempool that need validation right now: `check()` and `removeForReorg()`. This PR removes the dependencies in `check()`.
This PR also improves the performance of `CTxMemPool::check()` by walking through the entries exactly once, in ascending ancestorcount order, which guarantees that we see parents before children.
ACKs for top commit:
jnewbery:
reACK 082c5bf099c64e3d27abe9b68a71ce500b693e7e
GeneFerneau:
tACK [082c5bf](https://github.com/bitcoin/bitcoin/pull/23157/commits/082c5bf099c64e3d27abe9b68a71ce500b693e7e)
rajarshimaitra:
tACK https://github.com/bitcoin/bitcoin/pull/23157/commits/082c5bf099c64e3d27abe9b68a71ce500b693e7e
theStack:
Code-review ACK 082c5bf099c64e3d27abe9b68a71ce500b693e7e
Tree-SHA512: 40ac622af1627b5c3e6abb4f0f035d833265a8c5e8dc88faf5354875dfb5137f137825e54bbd2a2668ed37b145c5d02285f776402629f58596e51853a9a79d29
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Allowing callers to pass in a uint256 (which could be txid or wtxid)
but then always assuming that it's a txid is a footgunny interface.
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These helpers are exclusively used in txmempool.cpp, hence they
should also be moved there.
Can be reviewed with "--color-moved=dimmed-zebra".
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Removes check's dependency on validation.h
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No transaction in the mempool should ever be a coinbase.
Since mempoolDuplicate's backend is the chainstate coins view, it should
always contain the coins available.
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UpdateCoins is an unnecessary dependency on validation. All we need to
do is add and remove coins to check inputs. We don't need the extra
logic for checking coinbases and handling TxUndos.
Also remove the wrapper function in validation.h which constructs a
throwaway TxUndo object before calling UpdateCoins because it is now
unused.
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Remove variables used for keeping track of mempool transactions for
which we haven't processed the parents yet. Since we're iterating in
topological order now, they're always unused.
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No behavior changes.
Before, we're always adding transactions to the "check later" queue if
they have any parents in the mempool. But there's no reason to do this
if all of its inputs are already available from mempoolDuplicate.
Instead, check for inputs, and only mark fDependsWait=true if the
parents haven't been processed yet.
Reduce the amount of "check later" transactions by looking at
ancestors before descendants. Do this by iterating through them in
ascending order by ancestor count. This works because a child will
always have more in-mempool ancestors than its parent.
We should never have any entries in the "check later" queue
after this commit.
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This removes a bunch of boilerplate, makes the code easier to read.
Also, C++11 member initialization avoids accidental uninitialized
members.
Can be reviewed with the git option "--word-diff-regex=." or with "git
difftool --tool=meld".
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listunspent output
6cb60f3e6d652ffa4cf570426a7cf1f690d15c45 doc/release-notes: Add new listunspent fields (Luke Dashjr)
0be2f17ef5649c2d77efbbbdd9222332b2ebf0d2 QA: Add tests for listunspent ancestor{count,size,fees} to mempool_packages (Luke Dashjr)
6966e80f453c46d5d0a923118205f19ac2f4e336 RPC: Add ancestor{count,size,fees} to listunspent output (Luke Dashjr)
3f77dfdaf0f0bfe0c4662a616d6943f31bdd5bf4 Expose ancestorsize and ancestorfees via getTransactionAncestry (Luke Dashjr)
Pull request description:
Requested by a user
ACKs for top commit:
prayank23:
reACK https://github.com/bitcoin/bitcoin/commit/6cb60f3e6d652ffa4cf570426a7cf1f690d15c45
fjahr:
Code review re-ACK 6cb60f3e6d652ffa4cf570426a7cf1f690d15c45
kiminuo:
ACK [6cb60f3](https://github.com/bitcoin/bitcoin/commit/6cb60f3e6d652ffa4cf570426a7cf1f690d15c45)
achow101:
Code Review ACK 6cb60f3e6d652ffa4cf570426a7cf1f690d15c45
naumenkogs:
ACK 6cb60f3e6d652ffa4cf570426a7cf1f690d15c45
darosior:
utACK 6cb60f3e6d652ffa4cf570426a7cf1f690d15c45
Tree-SHA512: 5d16e5799558691e5853ab7ea2cc85514cb45da3ce69134d855c71845beef32ec6af5ab28d4462683e9800c8ea126f162773a9d3d5660edac08fd8edbfeda173
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When calculating ancestor/descendant counts for transactions in the
package, as a heuristic, count every transaction in the package as an
ancestor and descendant of every other transaction in the package.
This may overestimate, but will not underestimate, the
ancestor/descendant counts. This shortcut still produces an accurate
count for packages of 1 parent + 1 child.
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This does not change existing behavior.
The ancestor/descendant limits are inclusive of the entries themselves,
but CalculateAncestorsAndCheckLimits() does not need access to them.
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-BEGIN VERIFY SCRIPT-
find_regex='((assert|CHECK_NONFATAL)\(std::addressof|TODO: REVIEW-ONLY)' \
&& git grep -l -E "$find_regex" -- . \
| xargs sed -i -E "/${find_regex}/d"
-END VERIFY SCRIPT-
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Allow CheckSequenceLocks to use heights and coins from any CoinsView and
CBlockIndex provided. This means that CheckSequenceLocks() doesn't need
to hold the mempool lock or cs_main. The caller is responsible for
ensuring the CoinsView and CBlockIndex are consistent before passing
them in. The typical usage is still to create a CCoinsViewMemPool from
the mempool and grab the CBlockIndex from the chainstate tip.
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Also it is moved into its own module.
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In #21415 we decided to return `std::optional` rather than `{}` for
uninitialized values. This PR repalces the two remaining usages of `{}`
with `std::nullopt`.
As a side-effect, this also quells the spurious GCC 10.2.x warning that
we've had reported quite a few times. i.e #21318, #21248, #20797.
```bash
txmempool.cpp: In member function ‘CTxMemPool::setEntries CTxMemPool::GetIterSet(const std::set<uint256>&) const’:
txmempool.cpp:898:13: warning: ‘<anonymous>’ may be used uninitialized in this function [-Wmaybe-uninitialized]
898 | return {};
| ^
```
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-BEGIN VERIFY SCRIPT-
git rm src/optional.h
sed -i -e 's/Optional</std::optional</g' $(git grep -l 'Optional<' src)
sed -i -e 's/{nullopt}/{std::nullopt}/g' $(git grep -l 'nullopt' src)
sed -i -e 's/ nullopt;/ std::nullopt;/g' $(git grep -l 'nullopt' src)
sed -i -e 's/ nullopt)/ std::nullopt)/g' $(git grep -l 'nullopt' src)
sed -i -e 's/(nullopt)/(std::nullopt)/g' $(git grep -l 'nullopt' src)
sed -i -e 's/ nullopt,/ std::nullopt,/g' $(git grep -l 'nullopt' src)
sed -i -e 's/? nullopt :/? std::nullopt :/g' $(git grep -l 'nullopt' src)
sed -i -e 's/: nullopt}/: std::nullopt}/g' $(git grep -l 'nullopt' src)
sed -i -e '/optional.h \\/d' src/Makefile.am
sed -i -e '/#include <optional.h>/d' src/test/fuzz/autofile.cpp src/test/fuzz/buffered_file.cpp src/test/fuzz/node_eviction.cpp
sed -i -e 's/#include <optional.h>/#include <optional>/g' $(git grep -l '#include <optional.h>' src)
-END VERIFY SCRIPT-
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functions
e11b6496506246882df450586acf735dabedf731 validation: CVerifyDB::VerifyDB: Use locking annotation (Carl Dong)
03f75c42e12a272057adccb6f0077e71f971eeef validation: Use existing chain member in CChainState::LoadGenesisBlock (Carl Dong)
5e4af773809415b71a10e3120cc44854d61c4c19 validation: Use existing chain member in CChainState::AcceptBlock (Carl Dong)
fee73347c0015e4c24595c9708831d76cd6eec8c validation: Pass in chain to FindBlockPos+SaveBlockToDisk (Carl Dong)
a9d28bcd8d8f71d089322b1d631390352e31ee2b validation: Use *this in CChainState::ActivateBestChainStep (Carl Dong)
4744efc9bae8b22efb76152a3c045d054c880399 validation: Pass in chainstate to CTxMemPool::check (Carl Dong)
1fb7b2c59505a6b9768789f6caad215a0a22ef16 validation: Use *this in CChainState::InvalidateBlock (Carl Dong)
8cdb2f7e58dfd9a631a8cbb8f0ee7e8c0c304eb4 validation: Move LoadBlockIndexDB to CChainState (Carl Dong)
8b99efbcc08ab41caf657c6d730a27e6a91bc356 validation: Move invalid block handling to CChainState (Carl Dong)
2bdf37fe187ba6f090a0f5299b74d5d82cde4697 validation: Pass in chainstate to CVerifyDB::VerifyDB (Carl Dong)
31eac50c721dd3b0bd2347e76196bf16913e9be9 validation: Remove global ::VersionBitsTip{State,SinceHeight,Statistics} (Carl Dong)
63e4c7316a537900f525e221d8042587b443cc3d validation: Pass in chainstate to ::PruneBlockFilesManual (Carl Dong)
4bada76237d734c1de38d3bd58689caeefd5e8cb validation: Pass in chainstate to UpdateTip (Carl Dong)
a3ba08ba7dec0b016e42233cd4a061ba1a0e86c1 validation: Remove global ::{{Precious,Invalidate}Block,ResetBlockFailureFlags} (Carl Dong)
4927c9e6991b09a36a41aab93a0e05332d899611 validation: Remove global ::LoadGenesisBlock (Carl Dong)
9da106be4db692fa5db7b4de79f9cf7bfef37075 validation: Check chain tip is non-null in CheckFinalTx (Carl Dong)
Pull request description:
Overall PR: #20158 (tree-wide: De-globalize ChainstateManager)
Based on:
- [x] #20750 | [Bundle 2/n] Prune g_chainman usage in mempool-related validation functions
Note to reviewers:
1. This bundle may _apparently_ introduce usage of `g_chainman` or `::Chain(state|)Active()` globals, but these are resolved later on in the overall PR. [Commits of overall PR](https://github.com/bitcoin/bitcoin/pull/20158/commits)
2. There may be seemingly obvious local references to `ChainstateManager` or other validation objects which are not being used in callers of the current function in question, this is done intentionally to **_keep each commit centered around one function/method_** to ease review and to make the overall change systematic. We don't assume anything about our callers. Rest assured that once we are considering that particular caller in later commits, we will use the obvious local references. [Commits of overall PR](https://github.com/bitcoin/bitcoin/pull/20158/commits)
3. When changing a function/method that has many callers (e.g. `LookupBlockIndex` with 55 callers), it is sometimes easier (and less error-prone) to use a scripted-diff. When doing so, there will be 3 commits in sequence so that every commit compiles like so:
1. Add `new_function`, make `old_function` a wrapper of `new_function`, divert all calls to `old_function` to `new_function` **in the local module only**
2. Scripted-diff to divert all calls to `old_function` to `new_function` **in the rest of the codebase**
3. Remove `old_function`
Note to self:
- [x] Address: https://github.com/bitcoin/bitcoin/pull/20750#discussion_r579400663
ACKs for top commit:
laanwj:
Code review ACK e11b6496506246882df450586acf735dabedf731
Tree-SHA512: 205a451a741e32f17d5966de289f2f5a3f0817738c0087b70ff4755ddd217b53d01050ed396669bda2b1d216a88d927b9778777f9ff95ab1fe20e59c5f341776
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This is the only instance where validation reaches for something outside
of it.
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fd6580e405699ccb051fd2a34525e48d3253673d [refactor] txmempool: split epoch logic into class (Anthony Towns)
Pull request description:
Splits the epoch logic introduced in #17925 into a separate class.
Uses clang's thread safety annotations and encapsulates the data more strongly to reduce chances of bugs from API misuse.
ACKs for top commit:
jonatack:
ACK fd6580e405699ccb051fd2a34525e48d3253673d using clang thread safety annotations looks like a very good idea, and the encapsulation this change adds should improve robustness (and possible unit test-ability) of the code. Verified that changing some of the locking duly provoked build-time warnings with Clang 9 on Debian and that small changes in the new `Epoch` class were covered by failing functional test assertions in `mempool_updatefromblock.py`, `mempool_resurrect.py`, and `mempool_reorg.py`
hebasto:
re-ACK fd6580e405699ccb051fd2a34525e48d3253673d, since my [previous](https://github.com/bitcoin/bitcoin/pull/18017#pullrequestreview-569619362) review:
Tree-SHA512: 7004623faa02b56639aa05ab7a078320a6d8d54ec62d8022876221e33f350f47df51ddff056c0de5be798f8eb39b5c03c2d3f035698555d70abc218e950f2f8c
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Several other parameters are now redundant since they can be safely
obtained from the chainstate given that ::cs_main is locked. These are
now removed.
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-BEGIN VERIFY SCRIPT-
find_regex='\bAcceptToMemoryPool\(' \
&& git grep -l -E "$find_regex" -- src \
| grep -v '^src/validation\.\(cpp\|h\)$' \
| xargs sed -i -E 's@'"$find_regex"'@\0::ChainstateActive(), @g'
-END VERIFY SCRIPT-
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-BEGIN VERIFY SCRIPT-
find_regex='\bCheckFinalTx\(' \
&& git grep -l -E "$find_regex" -- src \
| grep -v '^src/validation\.\(cpp\|h\)$' \
| xargs sed -i -E 's@'"$find_regex"'@\0::ChainActive().Tip(), @g'
-END VERIFY SCRIPT-
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fa362064e383163a2585ffbc71ac1ea3bcc92663 rpc: Return total fee in mempool (MarcoFalke)
Pull request description:
This avoids having to loop over the whole mempool to query each entry's fee
ACKs for top commit:
achow101:
ACK fa362064e383163a2585ffbc71ac1ea3bcc92663
glozow:
ACK https://github.com/bitcoin/bitcoin/pull/20944/commits/fa362064e383163a2585ffbc71ac1ea3bcc92663 🧸
jnewbery:
ACK fa362064e383163a2585ffbc71ac1ea3bcc92663
Tree-SHA512: e2fa1664df39c9e187f9229fc35764ccf436f6f75889c5a206d34fff473fc21efbf2bb143f4ca7895c27659218c22884d0ec4195e7a536a5a96973fc9dd82d08
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[META] This commit should be followed up by removing the comments and
assertions meant only to show that the change is correct.
GetSpendHeight only acts on BlockManager.
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Also, add missing lock annotations
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Currently, CTxMemPool::check locks CTxMemPool's own cs member, then
calls GetSpendHeight which locks cs_main. This can potentially cause an
undesirable lock invesion since CTxMemPool's cs is supposed to be locked
after cs_main.
This does not cause us any problems right now because all callers of
CTxMemPool already lock cs_main before calling CTxMemPool::check, which
means that the LOCK(cs_main) in GetSpendHeight becomes benign.
However, it is currently possible for new code to be added which calls
CTxMemPool::check without locking cs_main (which would be dangerous).
Therefore we should make it explicit that cs_main needs to be held
before calling CTxMemPool::check.
NOTE: After all review-only assertions are removed in "#20158 |
tree-wide: De-globalize ChainstateManager", and assuming that we
keep the changes in "validation: Pass in spendheight to
CTxMemPool::check", we can re-evaluate to see if this annotation
is still necessary.
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281fd1a4a032cded7f9ea9857e3e99fc793c714b Replace KeyIDHasher with SaltedSipHasher (Andrew Chow)
210b693db66e7c5b618014b5a287aee15af00045 Add generic SaltedSipHasher (Andrew Chow)
95e61c1cf2a91d041c8025306ba36f0ea2806894 Move Hashers to util/hasher.{cpp/h} (Andrew Chow)
Pull request description:
There are existing `SaltedOutPointHasher` and `SaltedTxidHasher` classes used for `std::unordered_map` and `std::unordered_set` that could be useful in other places in the codebase. So we these to their own `saltedhash.{cpp/h}` file. An existing `KeyIDHasher` is moved there too. Additionally, `ScriptIDHasher`, `SaltedPubkeyHasher`, and `SaltedScriptHasher` are added so that they can be used in future work.
`KeyIDHasher` and `ScriptIDHasher` are not salted so that equality comparisons of maps and sets keyed by `CKeyID` and `CScriptID` will actually work.
Split from #19602 (and a few other PRs/branches I have).
ACKs for top commit:
laanwj:
Code review ACK 281fd1a4a032cded7f9ea9857e3e99fc793c714b
jonatack:
ACK 281fd1a4a032cded7f9ea9857e3e99fc793c714b, code review, debug build and ran bitcoind after rebasing to master @ dff0f6f753ea
fjahr:
utACK 281fd1a4a032cded7f9ea9857e3e99fc793c714b
Tree-SHA512: bb03b231ccf3c9ecefc997b8da9c3770af4819f9be5b0a72997a103864e84046a2ac39b8eadf0dc9247bdccd53f86f433642e3a098882e6748341a9e7736271b
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Move the hashers that we use for hash tables to a common place.
Moved hashers:
- SaltedTxidHasher
- SaltedOutpointHasher
- FilterHeaderHasher
- SignatureCacheHasher
- BlockHasher
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Shorten the CTxMemPool initializer list using default initialization
for members that dont depend on the constuctor parameters.
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Since m_check_ratio is only set once and since the CTxMemPool object is
no longer a global variable, m_check_ratio can be passed into the
constructor of CTxMemPool. Since it is only read from after
initialization, m_check_ratio can also be made a const and hence no
longer needs to be guarded by the cs mutex.
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Use a ratio instead of a frequency that requires a double to int cast
for determining how often a mempool sanity check should run.
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